Administration of the MapR-DB is done primarily via the command line (maprcli) or with the MapR Control System (MCS). Regardless of whether the MapR-DB table is used for binary files or JSON documents, the same types of commands are used with slightly different parameter options. MapR-DB administration is associated with tables, columns and column families, and table regions.

The MapR Data Access Gateway is a service that acts as a proxy and gateway for translating requests between lightweight client applications and the MapR cluster. This section describes considerations when upgrading the service, how to modify configuration settings, and how to administer and manage the service.

Response

Describes the different return responses.

The commands return responses in JSON or in a tabular format. When you run commands from
the command line, the response is returned in tabular format unless you specify JSON using
the -json option; when you run commands through the REST interface, the response is returned
in JSON.

Note: The columns returned by operations such as get, list,
info, and so on are not sorted in any particular order.

Success

On a successful call, each command returns the error code zero
(OK) and any data requested. When JSON output is specified, the data is returned as an array
of records along with the status code and the total number of records. In the tabular
format, the data is returned as a sequence of rows, each of which contains the fields in the
record separated by tabs.